1 /* vi: ts=8 sw=8 2 * 3 * TI 3410/5052 USB Serial Driver 4 * 5 * Copyright (C) 2004 Texas Instruments 6 * 7 * This driver is based on the Linux io_ti driver, which is 8 * Copyright (C) 2000-2002 Inside Out Networks 9 * Copyright (C) 2001-2002 Greg Kroah-Hartman 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * For questions or problems with this driver, contact Texas Instruments 17 * technical support, or Al Borchers <alborchers@steinerpoint.com>, or 18 * Peter Berger <pberger@brimson.com>. 19 * 20 * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052 21 * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device 22 * configuration. 23 * 24 * #!/bin/bash 25 * 26 * BOOT_CONFIG=1 27 * ACTIVE_CONFIG=2 28 * 29 * if [[ "$ACTION" != "add" ]] 30 * then 31 * exit 32 * fi 33 * 34 * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue 35 * 36 * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]] 37 * then 38 * exit 39 * fi 40 * 41 * PRODUCT=${PRODUCT%/?*} # delete version 42 * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}` 43 * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}` 44 * 45 * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters 46 * 47 * function scan() { 48 * s=$1 49 * shift 50 * for i 51 * do 52 * if [[ $s -eq $i ]] 53 * then 54 * return 0 55 * fi 56 * done 57 * return 1 58 * } 59 * 60 * IFS=$IFS, 61 * 62 * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` && 63 * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) || 64 * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` && 65 * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`) 66 * then 67 * echo $ACTIVE_CONFIG > $CONFIG_PATH 68 * fi 69 */ 70 71 #include <linux/kernel.h> 72 #include <linux/errno.h> 73 #include <linux/init.h> 74 #include <linux/slab.h> 75 #include <linux/tty.h> 76 #include <linux/tty_driver.h> 77 #include <linux/tty_flip.h> 78 #include <linux/module.h> 79 #include <linux/spinlock.h> 80 #include <linux/ioctl.h> 81 #include <linux/serial.h> 82 #include <linux/circ_buf.h> 83 #include <asm/uaccess.h> 84 #include <asm/semaphore.h> 85 #include <linux/usb.h> 86 #include <linux/usb/serial.h> 87 88 #include "ti_usb_3410_5052.h" 89 #include "ti_fw_3410.h" /* firmware image for 3410 */ 90 #include "ti_fw_5052.h" /* firmware image for 5052 */ 91 92 93 /* Defines */ 94 95 #define TI_DRIVER_VERSION "v0.9" 96 #define TI_DRIVER_AUTHOR "Al Borchers <alborchers@steinerpoint.com>" 97 #define TI_DRIVER_DESC "TI USB 3410/5052 Serial Driver" 98 99 #define TI_FIRMWARE_BUF_SIZE 16284 100 101 #define TI_WRITE_BUF_SIZE 1024 102 103 #define TI_TRANSFER_TIMEOUT 2 104 105 #define TI_DEFAULT_LOW_LATENCY 0 106 #define TI_DEFAULT_CLOSING_WAIT 4000 /* in .01 secs */ 107 108 /* supported setserial flags */ 109 #define TI_SET_SERIAL_FLAGS (ASYNC_LOW_LATENCY) 110 111 /* read urb states */ 112 #define TI_READ_URB_RUNNING 0 113 #define TI_READ_URB_STOPPING 1 114 #define TI_READ_URB_STOPPED 2 115 116 #define TI_EXTRA_VID_PID_COUNT 5 117 118 119 /* Structures */ 120 121 struct ti_port { 122 int tp_is_open; 123 __u8 tp_msr; 124 __u8 tp_lsr; 125 __u8 tp_shadow_mcr; 126 __u8 tp_uart_mode; /* 232 or 485 modes */ 127 unsigned int tp_uart_base_addr; 128 int tp_flags; 129 int tp_closing_wait;/* in .01 secs */ 130 struct async_icount tp_icount; 131 wait_queue_head_t tp_msr_wait; /* wait for msr change */ 132 wait_queue_head_t tp_write_wait; 133 struct ti_device *tp_tdev; 134 struct usb_serial_port *tp_port; 135 spinlock_t tp_lock; 136 int tp_read_urb_state; 137 int tp_write_urb_in_use; 138 struct circ_buf *tp_write_buf; 139 }; 140 141 struct ti_device { 142 struct semaphore td_open_close_sem; 143 int td_open_port_count; 144 struct usb_serial *td_serial; 145 int td_is_3410; 146 int td_urb_error; 147 }; 148 149 150 /* Function Declarations */ 151 152 static int ti_startup(struct usb_serial *serial); 153 static void ti_shutdown(struct usb_serial *serial); 154 static int ti_open(struct usb_serial_port *port, struct file *file); 155 static void ti_close(struct usb_serial_port *port, struct file *file); 156 static int ti_write(struct usb_serial_port *port, const unsigned char *data, 157 int count); 158 static int ti_write_room(struct usb_serial_port *port); 159 static int ti_chars_in_buffer(struct usb_serial_port *port); 160 static void ti_throttle(struct usb_serial_port *port); 161 static void ti_unthrottle(struct usb_serial_port *port); 162 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg); 163 static void ti_set_termios(struct usb_serial_port *port, 164 struct ktermios *old_termios); 165 static int ti_tiocmget(struct usb_serial_port *port, struct file *file); 166 static int ti_tiocmset(struct usb_serial_port *port, struct file *file, 167 unsigned int set, unsigned int clear); 168 static void ti_break(struct usb_serial_port *port, int break_state); 169 static void ti_interrupt_callback(struct urb *urb); 170 static void ti_bulk_in_callback(struct urb *urb); 171 static void ti_bulk_out_callback(struct urb *urb); 172 173 static void ti_recv(struct device *dev, struct tty_struct *tty, 174 unsigned char *data, int length); 175 static void ti_send(struct ti_port *tport); 176 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr); 177 static int ti_get_lsr(struct ti_port *tport); 178 static int ti_get_serial_info(struct ti_port *tport, 179 struct serial_struct __user *ret_arg); 180 static int ti_set_serial_info(struct ti_port *tport, 181 struct serial_struct __user *new_arg); 182 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr); 183 184 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush); 185 186 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty); 187 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty); 188 189 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 190 __u16 moduleid, __u16 value, __u8 *data, int size); 191 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 192 __u16 moduleid, __u16 value, __u8 *data, int size); 193 194 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 195 __u8 mask, __u8 byte); 196 197 static int ti_download_firmware(struct ti_device *tdev, 198 unsigned char *firmware, unsigned int firmware_size); 199 200 /* circular buffer */ 201 static struct circ_buf *ti_buf_alloc(void); 202 static void ti_buf_free(struct circ_buf *cb); 203 static void ti_buf_clear(struct circ_buf *cb); 204 static int ti_buf_data_avail(struct circ_buf *cb); 205 static int ti_buf_space_avail(struct circ_buf *cb); 206 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count); 207 static int ti_buf_get(struct circ_buf *cb, char *buf, int count); 208 209 210 /* Data */ 211 212 /* module parameters */ 213 static int debug; 214 static int low_latency = TI_DEFAULT_LOW_LATENCY; 215 static int closing_wait = TI_DEFAULT_CLOSING_WAIT; 216 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT]; 217 static int vendor_3410_count; 218 static ushort product_3410[TI_EXTRA_VID_PID_COUNT]; 219 static int product_3410_count; 220 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT]; 221 static int vendor_5052_count; 222 static ushort product_5052[TI_EXTRA_VID_PID_COUNT]; 223 static int product_5052_count; 224 225 /* supported devices */ 226 /* the array dimension is the number of default entries plus */ 227 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */ 228 /* null entry */ 229 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = { 230 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 231 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 232 }; 233 234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = { 235 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 236 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 237 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 238 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 239 }; 240 241 static struct usb_device_id ti_id_table_combined[] = { 242 { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) }, 243 { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) }, 244 { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) }, 245 { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) }, 246 { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) }, 247 { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) }, 248 { } 249 }; 250 251 static struct usb_driver ti_usb_driver = { 252 .name = "ti_usb_3410_5052", 253 .probe = usb_serial_probe, 254 .disconnect = usb_serial_disconnect, 255 .id_table = ti_id_table_combined, 256 .no_dynamic_id = 1, 257 }; 258 259 static struct usb_serial_driver ti_1port_device = { 260 .driver = { 261 .owner = THIS_MODULE, 262 .name = "ti_usb_3410_5052_1", 263 }, 264 .description = "TI USB 3410 1 port adapter", 265 .usb_driver = &ti_usb_driver, 266 .id_table = ti_id_table_3410, 267 .num_interrupt_in = 1, 268 .num_bulk_in = 1, 269 .num_bulk_out = 1, 270 .num_ports = 1, 271 .attach = ti_startup, 272 .shutdown = ti_shutdown, 273 .open = ti_open, 274 .close = ti_close, 275 .write = ti_write, 276 .write_room = ti_write_room, 277 .chars_in_buffer = ti_chars_in_buffer, 278 .throttle = ti_throttle, 279 .unthrottle = ti_unthrottle, 280 .ioctl = ti_ioctl, 281 .set_termios = ti_set_termios, 282 .tiocmget = ti_tiocmget, 283 .tiocmset = ti_tiocmset, 284 .break_ctl = ti_break, 285 .read_int_callback = ti_interrupt_callback, 286 .read_bulk_callback = ti_bulk_in_callback, 287 .write_bulk_callback = ti_bulk_out_callback, 288 }; 289 290 static struct usb_serial_driver ti_2port_device = { 291 .driver = { 292 .owner = THIS_MODULE, 293 .name = "ti_usb_3410_5052_2", 294 }, 295 .description = "TI USB 5052 2 port adapter", 296 .usb_driver = &ti_usb_driver, 297 .id_table = ti_id_table_5052, 298 .num_interrupt_in = 1, 299 .num_bulk_in = 2, 300 .num_bulk_out = 2, 301 .num_ports = 2, 302 .attach = ti_startup, 303 .shutdown = ti_shutdown, 304 .open = ti_open, 305 .close = ti_close, 306 .write = ti_write, 307 .write_room = ti_write_room, 308 .chars_in_buffer = ti_chars_in_buffer, 309 .throttle = ti_throttle, 310 .unthrottle = ti_unthrottle, 311 .ioctl = ti_ioctl, 312 .set_termios = ti_set_termios, 313 .tiocmget = ti_tiocmget, 314 .tiocmset = ti_tiocmset, 315 .break_ctl = ti_break, 316 .read_int_callback = ti_interrupt_callback, 317 .read_bulk_callback = ti_bulk_in_callback, 318 .write_bulk_callback = ti_bulk_out_callback, 319 }; 320 321 322 /* Module */ 323 324 MODULE_AUTHOR(TI_DRIVER_AUTHOR); 325 MODULE_DESCRIPTION(TI_DRIVER_DESC); 326 MODULE_VERSION(TI_DRIVER_VERSION); 327 MODULE_LICENSE("GPL"); 328 329 module_param(debug, bool, S_IRUGO | S_IWUSR); 330 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes"); 331 332 module_param(low_latency, bool, S_IRUGO | S_IWUSR); 333 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off"); 334 335 module_param(closing_wait, int, S_IRUGO | S_IWUSR); 336 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000"); 337 338 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO); 339 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers"); 340 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO); 341 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers"); 342 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO); 343 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers"); 344 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO); 345 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers"); 346 347 MODULE_DEVICE_TABLE(usb, ti_id_table_combined); 348 349 350 /* Functions */ 351 352 static int __init ti_init(void) 353 { 354 int i,j; 355 int ret; 356 357 /* insert extra vendor and product ids */ 358 j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1; 359 for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) { 360 ti_id_table_3410[j].idVendor = vendor_3410[i]; 361 ti_id_table_3410[j].idProduct = product_3410[i]; 362 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 363 } 364 j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1; 365 for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) { 366 ti_id_table_5052[j].idVendor = vendor_5052[i]; 367 ti_id_table_5052[j].idProduct = product_5052[i]; 368 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE; 369 } 370 371 ret = usb_serial_register(&ti_1port_device); 372 if (ret) 373 goto failed_1port; 374 ret = usb_serial_register(&ti_2port_device); 375 if (ret) 376 goto failed_2port; 377 378 ret = usb_register(&ti_usb_driver); 379 if (ret) 380 goto failed_usb; 381 382 info(TI_DRIVER_DESC " " TI_DRIVER_VERSION); 383 384 return 0; 385 386 failed_usb: 387 usb_serial_deregister(&ti_2port_device); 388 failed_2port: 389 usb_serial_deregister(&ti_1port_device); 390 failed_1port: 391 return ret; 392 } 393 394 395 static void __exit ti_exit(void) 396 { 397 usb_serial_deregister(&ti_1port_device); 398 usb_serial_deregister(&ti_2port_device); 399 usb_deregister(&ti_usb_driver); 400 } 401 402 403 module_init(ti_init); 404 module_exit(ti_exit); 405 406 407 static int ti_startup(struct usb_serial *serial) 408 { 409 struct ti_device *tdev; 410 struct ti_port *tport; 411 struct usb_device *dev = serial->dev; 412 int status; 413 int i; 414 415 416 dbg("%s - product 0x%4X, num configurations %d, configuration value %d", 417 __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct), 418 dev->descriptor.bNumConfigurations, 419 dev->actconfig->desc.bConfigurationValue); 420 421 /* create device structure */ 422 tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL); 423 if (tdev == NULL) { 424 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 425 return -ENOMEM; 426 } 427 sema_init(&tdev->td_open_close_sem, 1); 428 tdev->td_serial = serial; 429 usb_set_serial_data(serial, tdev); 430 431 /* determine device type */ 432 if (usb_match_id(serial->interface, ti_id_table_3410)) 433 tdev->td_is_3410 = 1; 434 dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052"); 435 436 /* if we have only 1 configuration, download firmware */ 437 if (dev->descriptor.bNumConfigurations == 1) { 438 439 if (tdev->td_is_3410) 440 status = ti_download_firmware(tdev, ti_fw_3410, 441 sizeof(ti_fw_3410)); 442 else 443 status = ti_download_firmware(tdev, ti_fw_5052, 444 sizeof(ti_fw_5052)); 445 if (status) 446 goto free_tdev; 447 448 /* 3410 must be reset, 5052 resets itself */ 449 if (tdev->td_is_3410) { 450 msleep_interruptible(100); 451 usb_reset_device(dev); 452 } 453 454 status = -ENODEV; 455 goto free_tdev; 456 } 457 458 /* the second configuration must be set (in sysfs by hotplug script) */ 459 if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) { 460 status = -ENODEV; 461 goto free_tdev; 462 } 463 464 /* set up port structures */ 465 for (i = 0; i < serial->num_ports; ++i) { 466 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL); 467 if (tport == NULL) { 468 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 469 status = -ENOMEM; 470 goto free_tports; 471 } 472 spin_lock_init(&tport->tp_lock); 473 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR); 474 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0; 475 tport->tp_closing_wait = closing_wait; 476 init_waitqueue_head(&tport->tp_msr_wait); 477 init_waitqueue_head(&tport->tp_write_wait); 478 tport->tp_write_buf = ti_buf_alloc(); 479 if (tport->tp_write_buf == NULL) { 480 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 481 kfree(tport); 482 status = -ENOMEM; 483 goto free_tports; 484 } 485 tport->tp_port = serial->port[i]; 486 tport->tp_tdev = tdev; 487 usb_set_serial_port_data(serial->port[i], tport); 488 tport->tp_uart_mode = 0; /* default is RS232 */ 489 } 490 491 return 0; 492 493 free_tports: 494 for (--i; i>=0; --i) { 495 tport = usb_get_serial_port_data(serial->port[i]); 496 ti_buf_free(tport->tp_write_buf); 497 kfree(tport); 498 usb_set_serial_port_data(serial->port[i], NULL); 499 } 500 free_tdev: 501 kfree(tdev); 502 usb_set_serial_data(serial, NULL); 503 return status; 504 } 505 506 507 static void ti_shutdown(struct usb_serial *serial) 508 { 509 int i; 510 struct ti_device *tdev = usb_get_serial_data(serial); 511 struct ti_port *tport; 512 513 dbg("%s", __FUNCTION__); 514 515 for (i=0; i < serial->num_ports; ++i) { 516 tport = usb_get_serial_port_data(serial->port[i]); 517 if (tport) { 518 ti_buf_free(tport->tp_write_buf); 519 kfree(tport); 520 usb_set_serial_port_data(serial->port[i], NULL); 521 } 522 } 523 524 kfree(tdev); 525 usb_set_serial_data(serial, NULL); 526 } 527 528 529 static int ti_open(struct usb_serial_port *port, struct file *file) 530 { 531 struct ti_port *tport = usb_get_serial_port_data(port); 532 struct ti_device *tdev; 533 struct usb_device *dev; 534 struct urb *urb; 535 int port_number; 536 int status; 537 __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS | 538 TI_PIPE_TIMEOUT_ENABLE | 539 (TI_TRANSFER_TIMEOUT << 2)); 540 541 dbg("%s - port %d", __FUNCTION__, port->number); 542 543 if (tport == NULL) 544 return -ENODEV; 545 546 dev = port->serial->dev; 547 tdev = tport->tp_tdev; 548 549 /* only one open on any port on a device at a time */ 550 if (down_interruptible(&tdev->td_open_close_sem)) 551 return -ERESTARTSYS; 552 553 if (port->tty) 554 port->tty->low_latency = 555 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 556 557 port_number = port->number - port->serial->minor; 558 559 memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount)); 560 561 tport->tp_msr = 0; 562 tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR); 563 564 /* start interrupt urb the first time a port is opened on this device */ 565 if (tdev->td_open_port_count == 0) { 566 dbg("%s - start interrupt in urb", __FUNCTION__); 567 urb = tdev->td_serial->port[0]->interrupt_in_urb; 568 if (!urb) { 569 dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__); 570 status = -EINVAL; 571 goto up_sem; 572 } 573 urb->complete = ti_interrupt_callback; 574 urb->context = tdev; 575 urb->dev = dev; 576 status = usb_submit_urb(urb, GFP_KERNEL); 577 if (status) { 578 dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status); 579 goto up_sem; 580 } 581 } 582 583 ti_set_termios(port, NULL); 584 585 dbg("%s - sending TI_OPEN_PORT", __FUNCTION__); 586 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 587 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 588 if (status) { 589 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status); 590 goto unlink_int_urb; 591 } 592 593 dbg("%s - sending TI_START_PORT", __FUNCTION__); 594 status = ti_command_out_sync(tdev, TI_START_PORT, 595 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 596 if (status) { 597 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status); 598 goto unlink_int_urb; 599 } 600 601 dbg("%s - sending TI_PURGE_PORT", __FUNCTION__); 602 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 603 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0); 604 if (status) { 605 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status); 606 goto unlink_int_urb; 607 } 608 status = ti_command_out_sync(tdev, TI_PURGE_PORT, 609 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0); 610 if (status) { 611 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status); 612 goto unlink_int_urb; 613 } 614 615 /* reset the data toggle on the bulk endpoints to work around bug in 616 * host controllers where things get out of sync some times */ 617 usb_clear_halt(dev, port->write_urb->pipe); 618 usb_clear_halt(dev, port->read_urb->pipe); 619 620 ti_set_termios(port, NULL); 621 622 dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__); 623 status = ti_command_out_sync(tdev, TI_OPEN_PORT, 624 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0); 625 if (status) { 626 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status); 627 goto unlink_int_urb; 628 } 629 630 dbg("%s - sending TI_START_PORT (2)", __FUNCTION__); 631 status = ti_command_out_sync(tdev, TI_START_PORT, 632 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 633 if (status) { 634 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status); 635 goto unlink_int_urb; 636 } 637 638 /* start read urb */ 639 dbg("%s - start read urb", __FUNCTION__); 640 urb = port->read_urb; 641 if (!urb) { 642 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__); 643 status = -EINVAL; 644 goto unlink_int_urb; 645 } 646 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 647 urb->complete = ti_bulk_in_callback; 648 urb->context = tport; 649 urb->dev = dev; 650 status = usb_submit_urb(urb, GFP_KERNEL); 651 if (status) { 652 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status); 653 goto unlink_int_urb; 654 } 655 656 tport->tp_is_open = 1; 657 ++tdev->td_open_port_count; 658 659 goto up_sem; 660 661 unlink_int_urb: 662 if (tdev->td_open_port_count == 0) 663 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 664 up_sem: 665 up(&tdev->td_open_close_sem); 666 dbg("%s - exit %d", __FUNCTION__, status); 667 return status; 668 } 669 670 671 static void ti_close(struct usb_serial_port *port, struct file *file) 672 { 673 struct ti_device *tdev; 674 struct ti_port *tport; 675 int port_number; 676 int status; 677 int do_up; 678 679 dbg("%s - port %d", __FUNCTION__, port->number); 680 681 tdev = usb_get_serial_data(port->serial); 682 tport = usb_get_serial_port_data(port); 683 if (tdev == NULL || tport == NULL) 684 return; 685 686 tport->tp_is_open = 0; 687 688 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1); 689 690 usb_kill_urb(port->read_urb); 691 usb_kill_urb(port->write_urb); 692 tport->tp_write_urb_in_use = 0; 693 694 port_number = port->number - port->serial->minor; 695 696 dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__); 697 status = ti_command_out_sync(tdev, TI_CLOSE_PORT, 698 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0); 699 if (status) 700 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status); 701 702 /* if down is interrupted, continue anyway */ 703 do_up = !down_interruptible(&tdev->td_open_close_sem); 704 --tport->tp_tdev->td_open_port_count; 705 if (tport->tp_tdev->td_open_port_count <= 0) { 706 /* last port is closed, shut down interrupt urb */ 707 usb_kill_urb(port->serial->port[0]->interrupt_in_urb); 708 tport->tp_tdev->td_open_port_count = 0; 709 } 710 if (do_up) 711 up(&tdev->td_open_close_sem); 712 713 dbg("%s - exit", __FUNCTION__); 714 } 715 716 717 static int ti_write(struct usb_serial_port *port, const unsigned char *data, 718 int count) 719 { 720 struct ti_port *tport = usb_get_serial_port_data(port); 721 unsigned long flags; 722 723 dbg("%s - port %d", __FUNCTION__, port->number); 724 725 if (count == 0) { 726 dbg("%s - write request of 0 bytes", __FUNCTION__); 727 return 0; 728 } 729 730 if (tport == NULL || !tport->tp_is_open) 731 return -ENODEV; 732 733 spin_lock_irqsave(&tport->tp_lock, flags); 734 count = ti_buf_put(tport->tp_write_buf, data, count); 735 spin_unlock_irqrestore(&tport->tp_lock, flags); 736 737 ti_send(tport); 738 739 return count; 740 } 741 742 743 static int ti_write_room(struct usb_serial_port *port) 744 { 745 struct ti_port *tport = usb_get_serial_port_data(port); 746 int room = 0; 747 unsigned long flags; 748 749 dbg("%s - port %d", __FUNCTION__, port->number); 750 751 if (tport == NULL) 752 return -ENODEV; 753 754 spin_lock_irqsave(&tport->tp_lock, flags); 755 room = ti_buf_space_avail(tport->tp_write_buf); 756 spin_unlock_irqrestore(&tport->tp_lock, flags); 757 758 dbg("%s - returns %d", __FUNCTION__, room); 759 return room; 760 } 761 762 763 static int ti_chars_in_buffer(struct usb_serial_port *port) 764 { 765 struct ti_port *tport = usb_get_serial_port_data(port); 766 int chars = 0; 767 unsigned long flags; 768 769 dbg("%s - port %d", __FUNCTION__, port->number); 770 771 if (tport == NULL) 772 return -ENODEV; 773 774 spin_lock_irqsave(&tport->tp_lock, flags); 775 chars = ti_buf_data_avail(tport->tp_write_buf); 776 spin_unlock_irqrestore(&tport->tp_lock, flags); 777 778 dbg("%s - returns %d", __FUNCTION__, chars); 779 return chars; 780 } 781 782 783 static void ti_throttle(struct usb_serial_port *port) 784 { 785 struct ti_port *tport = usb_get_serial_port_data(port); 786 struct tty_struct *tty; 787 788 dbg("%s - port %d", __FUNCTION__, port->number); 789 790 if (tport == NULL) 791 return; 792 793 tty = port->tty; 794 if (!tty) { 795 dbg("%s - no tty", __FUNCTION__); 796 return; 797 } 798 799 if (I_IXOFF(tty) || C_CRTSCTS(tty)) 800 ti_stop_read(tport, tty); 801 802 } 803 804 805 static void ti_unthrottle(struct usb_serial_port *port) 806 { 807 struct ti_port *tport = usb_get_serial_port_data(port); 808 struct tty_struct *tty; 809 int status; 810 811 dbg("%s - port %d", __FUNCTION__, port->number); 812 813 if (tport == NULL) 814 return; 815 816 tty = port->tty; 817 if (!tty) { 818 dbg("%s - no tty", __FUNCTION__); 819 return; 820 } 821 822 if (I_IXOFF(tty) || C_CRTSCTS(tty)) { 823 status = ti_restart_read(tport, tty); 824 if (status) 825 dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status); 826 } 827 } 828 829 830 static int ti_ioctl(struct usb_serial_port *port, struct file *file, 831 unsigned int cmd, unsigned long arg) 832 { 833 struct ti_port *tport = usb_get_serial_port_data(port); 834 struct async_icount cnow; 835 struct async_icount cprev; 836 837 dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd); 838 839 if (tport == NULL) 840 return -ENODEV; 841 842 switch (cmd) { 843 case TIOCGSERIAL: 844 dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number); 845 return ti_get_serial_info(tport, (struct serial_struct __user *)arg); 846 break; 847 848 case TIOCSSERIAL: 849 dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number); 850 return ti_set_serial_info(tport, (struct serial_struct __user *)arg); 851 break; 852 853 case TIOCMIWAIT: 854 dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number); 855 cprev = tport->tp_icount; 856 while (1) { 857 interruptible_sleep_on(&tport->tp_msr_wait); 858 if (signal_pending(current)) 859 return -ERESTARTSYS; 860 cnow = tport->tp_icount; 861 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && 862 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) 863 return -EIO; /* no change => error */ 864 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || 865 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || 866 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || 867 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) { 868 return 0; 869 } 870 cprev = cnow; 871 } 872 break; 873 874 case TIOCGICOUNT: 875 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx); 876 if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount))) 877 return -EFAULT; 878 return 0; 879 } 880 881 return -ENOIOCTLCMD; 882 } 883 884 885 static void ti_set_termios(struct usb_serial_port *port, 886 struct ktermios *old_termios) 887 { 888 struct ti_port *tport = usb_get_serial_port_data(port); 889 struct tty_struct *tty = port->tty; 890 struct ti_uart_config *config; 891 tcflag_t cflag,iflag; 892 int baud; 893 int status; 894 int port_number = port->number - port->serial->minor; 895 unsigned int mcr; 896 897 dbg("%s - port %d", __FUNCTION__, port->number); 898 899 if (!tty || !tty->termios) { 900 dbg("%s - no tty or termios", __FUNCTION__); 901 return; 902 } 903 904 cflag = tty->termios->c_cflag; 905 iflag = tty->termios->c_iflag; 906 907 if (old_termios && cflag == old_termios->c_cflag 908 && iflag == old_termios->c_iflag) { 909 dbg("%s - nothing to change", __FUNCTION__); 910 return; 911 } 912 913 dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag); 914 915 if (old_termios) 916 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag); 917 918 if (tport == NULL) 919 return; 920 921 config = kmalloc(sizeof(*config), GFP_KERNEL); 922 if (!config) { 923 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__); 924 return; 925 } 926 927 config->wFlags = 0; 928 929 /* these flags must be set */ 930 config->wFlags |= TI_UART_ENABLE_MS_INTS; 931 config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA; 932 config->bUartMode = (__u8)(tport->tp_uart_mode); 933 934 switch (cflag & CSIZE) { 935 case CS5: 936 config->bDataBits = TI_UART_5_DATA_BITS; 937 break; 938 case CS6: 939 config->bDataBits = TI_UART_6_DATA_BITS; 940 break; 941 case CS7: 942 config->bDataBits = TI_UART_7_DATA_BITS; 943 break; 944 default: 945 case CS8: 946 config->bDataBits = TI_UART_8_DATA_BITS; 947 break; 948 } 949 950 if (cflag & PARENB) { 951 if (cflag & PARODD) { 952 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 953 config->bParity = TI_UART_ODD_PARITY; 954 } else { 955 config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING; 956 config->bParity = TI_UART_EVEN_PARITY; 957 } 958 } else { 959 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING; 960 config->bParity = TI_UART_NO_PARITY; 961 } 962 963 if (cflag & CSTOPB) 964 config->bStopBits = TI_UART_2_STOP_BITS; 965 else 966 config->bStopBits = TI_UART_1_STOP_BITS; 967 968 if (cflag & CRTSCTS) { 969 /* RTS flow control must be off to drop RTS for baud rate B0 */ 970 if ((cflag & CBAUD) != B0) 971 config->wFlags |= TI_UART_ENABLE_RTS_IN; 972 config->wFlags |= TI_UART_ENABLE_CTS_OUT; 973 } else { 974 tty->hw_stopped = 0; 975 ti_restart_read(tport, tty); 976 } 977 978 if (I_IXOFF(tty) || I_IXON(tty)) { 979 config->cXon = START_CHAR(tty); 980 config->cXoff = STOP_CHAR(tty); 981 982 if (I_IXOFF(tty)) 983 config->wFlags |= TI_UART_ENABLE_X_IN; 984 else 985 ti_restart_read(tport, tty); 986 987 if (I_IXON(tty)) 988 config->wFlags |= TI_UART_ENABLE_X_OUT; 989 } 990 991 baud = tty_get_baud_rate(tty); 992 if (!baud) baud = 9600; 993 if (tport->tp_tdev->td_is_3410) 994 config->wBaudRate = (__u16)((923077 + baud/2) / baud); 995 else 996 config->wBaudRate = (__u16)((461538 + baud/2) / baud); 997 998 dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d", 999 __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode); 1000 1001 cpu_to_be16s(&config->wBaudRate); 1002 cpu_to_be16s(&config->wFlags); 1003 1004 status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG, 1005 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config, 1006 sizeof(*config)); 1007 if (status) 1008 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status); 1009 1010 /* SET_CONFIG asserts RTS and DTR, reset them correctly */ 1011 mcr = tport->tp_shadow_mcr; 1012 /* if baud rate is B0, clear RTS and DTR */ 1013 if ((cflag & CBAUD) == B0) 1014 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS); 1015 status = ti_set_mcr(tport, mcr); 1016 if (status) 1017 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status); 1018 1019 kfree(config); 1020 } 1021 1022 1023 static int ti_tiocmget(struct usb_serial_port *port, struct file *file) 1024 { 1025 struct ti_port *tport = usb_get_serial_port_data(port); 1026 unsigned int result; 1027 unsigned int msr; 1028 unsigned int mcr; 1029 1030 dbg("%s - port %d", __FUNCTION__, port->number); 1031 1032 if (tport == NULL) 1033 return -ENODEV; 1034 1035 msr = tport->tp_msr; 1036 mcr = tport->tp_shadow_mcr; 1037 1038 result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0) 1039 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0) 1040 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0) 1041 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0) 1042 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0) 1043 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0) 1044 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0); 1045 1046 dbg("%s - 0x%04X", __FUNCTION__, result); 1047 1048 return result; 1049 } 1050 1051 1052 static int ti_tiocmset(struct usb_serial_port *port, struct file *file, 1053 unsigned int set, unsigned int clear) 1054 { 1055 struct ti_port *tport = usb_get_serial_port_data(port); 1056 unsigned int mcr; 1057 1058 dbg("%s - port %d", __FUNCTION__, port->number); 1059 1060 if (tport == NULL) 1061 return -ENODEV; 1062 1063 mcr = tport->tp_shadow_mcr; 1064 1065 if (set & TIOCM_RTS) 1066 mcr |= TI_MCR_RTS; 1067 if (set & TIOCM_DTR) 1068 mcr |= TI_MCR_DTR; 1069 if (set & TIOCM_LOOP) 1070 mcr |= TI_MCR_LOOP; 1071 1072 if (clear & TIOCM_RTS) 1073 mcr &= ~TI_MCR_RTS; 1074 if (clear & TIOCM_DTR) 1075 mcr &= ~TI_MCR_DTR; 1076 if (clear & TIOCM_LOOP) 1077 mcr &= ~TI_MCR_LOOP; 1078 1079 return ti_set_mcr(tport, mcr); 1080 } 1081 1082 1083 static void ti_break(struct usb_serial_port *port, int break_state) 1084 { 1085 struct ti_port *tport = usb_get_serial_port_data(port); 1086 int status; 1087 1088 dbg("%s - state = %d", __FUNCTION__, break_state); 1089 1090 if (tport == NULL) 1091 return; 1092 1093 ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0); 1094 1095 status = ti_write_byte(tport->tp_tdev, 1096 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR, 1097 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0); 1098 1099 if (status) 1100 dbg("%s - error setting break, %d", __FUNCTION__, status); 1101 } 1102 1103 1104 static void ti_interrupt_callback(struct urb *urb) 1105 { 1106 struct ti_device *tdev = (struct ti_device *)urb->context; 1107 struct usb_serial_port *port; 1108 struct usb_serial *serial = tdev->td_serial; 1109 struct ti_port *tport; 1110 struct device *dev = &urb->dev->dev; 1111 unsigned char *data = urb->transfer_buffer; 1112 int length = urb->actual_length; 1113 int port_number; 1114 int function; 1115 int status; 1116 __u8 msr; 1117 1118 dbg("%s", __FUNCTION__); 1119 1120 switch (urb->status) { 1121 case 0: 1122 break; 1123 case -ECONNRESET: 1124 case -ENOENT: 1125 case -ESHUTDOWN: 1126 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status); 1127 tdev->td_urb_error = 1; 1128 return; 1129 default: 1130 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status); 1131 tdev->td_urb_error = 1; 1132 goto exit; 1133 } 1134 1135 if (length != 2) { 1136 dbg("%s - bad packet size, %d", __FUNCTION__, length); 1137 goto exit; 1138 } 1139 1140 if (data[0] == TI_CODE_HARDWARE_ERROR) { 1141 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]); 1142 goto exit; 1143 } 1144 1145 port_number = TI_GET_PORT_FROM_CODE(data[0]); 1146 function = TI_GET_FUNC_FROM_CODE(data[0]); 1147 1148 dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]); 1149 1150 if (port_number >= serial->num_ports) { 1151 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number); 1152 goto exit; 1153 } 1154 1155 port = serial->port[port_number]; 1156 1157 tport = usb_get_serial_port_data(port); 1158 if (!tport) 1159 goto exit; 1160 1161 switch (function) { 1162 case TI_CODE_DATA_ERROR: 1163 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]); 1164 break; 1165 1166 case TI_CODE_MODEM_STATUS: 1167 msr = data[1]; 1168 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr); 1169 ti_handle_new_msr(tport, msr); 1170 break; 1171 1172 default: 1173 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]); 1174 break; 1175 } 1176 1177 exit: 1178 status = usb_submit_urb(urb, GFP_ATOMIC); 1179 if (status) 1180 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status); 1181 } 1182 1183 1184 static void ti_bulk_in_callback(struct urb *urb) 1185 { 1186 struct ti_port *tport = (struct ti_port *)urb->context; 1187 struct usb_serial_port *port = tport->tp_port; 1188 struct device *dev = &urb->dev->dev; 1189 int status = 0; 1190 1191 dbg("%s", __FUNCTION__); 1192 1193 switch (urb->status) { 1194 case 0: 1195 break; 1196 case -ECONNRESET: 1197 case -ENOENT: 1198 case -ESHUTDOWN: 1199 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status); 1200 tport->tp_tdev->td_urb_error = 1; 1201 wake_up_interruptible(&tport->tp_write_wait); 1202 return; 1203 default: 1204 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status ); 1205 tport->tp_tdev->td_urb_error = 1; 1206 wake_up_interruptible(&tport->tp_write_wait); 1207 } 1208 1209 if (urb->status == -EPIPE) 1210 goto exit; 1211 1212 if (urb->status) { 1213 dev_err(dev, "%s - stopping read!\n", __FUNCTION__); 1214 return; 1215 } 1216 1217 if (port->tty && urb->actual_length) { 1218 usb_serial_debug_data(debug, dev, __FUNCTION__, 1219 urb->actual_length, urb->transfer_buffer); 1220 1221 if (!tport->tp_is_open) 1222 dbg("%s - port closed, dropping data", __FUNCTION__); 1223 else 1224 ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer, 1225 urb->actual_length); 1226 1227 spin_lock(&tport->tp_lock); 1228 tport->tp_icount.rx += urb->actual_length; 1229 spin_unlock(&tport->tp_lock); 1230 } 1231 1232 exit: 1233 /* continue to read unless stopping */ 1234 spin_lock(&tport->tp_lock); 1235 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) { 1236 urb->dev = port->serial->dev; 1237 status = usb_submit_urb(urb, GFP_ATOMIC); 1238 } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) { 1239 tport->tp_read_urb_state = TI_READ_URB_STOPPED; 1240 } 1241 spin_unlock(&tport->tp_lock); 1242 if (status) 1243 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status); 1244 } 1245 1246 1247 static void ti_bulk_out_callback(struct urb *urb) 1248 { 1249 struct ti_port *tport = (struct ti_port *)urb->context; 1250 struct usb_serial_port *port = tport->tp_port; 1251 struct device *dev = &urb->dev->dev; 1252 1253 dbg("%s - port %d", __FUNCTION__, port->number); 1254 1255 tport->tp_write_urb_in_use = 0; 1256 1257 switch (urb->status) { 1258 case 0: 1259 break; 1260 case -ECONNRESET: 1261 case -ENOENT: 1262 case -ESHUTDOWN: 1263 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status); 1264 tport->tp_tdev->td_urb_error = 1; 1265 wake_up_interruptible(&tport->tp_write_wait); 1266 return; 1267 default: 1268 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status); 1269 tport->tp_tdev->td_urb_error = 1; 1270 wake_up_interruptible(&tport->tp_write_wait); 1271 } 1272 1273 /* send any buffered data */ 1274 ti_send(tport); 1275 } 1276 1277 1278 static void ti_recv(struct device *dev, struct tty_struct *tty, 1279 unsigned char *data, int length) 1280 { 1281 int cnt; 1282 1283 do { 1284 cnt = tty_buffer_request_room(tty, length); 1285 if (cnt < length) { 1286 dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt); 1287 if(cnt == 0) 1288 break; 1289 } 1290 tty_insert_flip_string(tty, data, cnt); 1291 tty_flip_buffer_push(tty); 1292 data += cnt; 1293 length -= cnt; 1294 } while (length > 0); 1295 1296 } 1297 1298 1299 static void ti_send(struct ti_port *tport) 1300 { 1301 int count, result; 1302 struct usb_serial_port *port = tport->tp_port; 1303 struct tty_struct *tty = port->tty; 1304 unsigned long flags; 1305 1306 1307 dbg("%s - port %d", __FUNCTION__, port->number); 1308 1309 spin_lock_irqsave(&tport->tp_lock, flags); 1310 1311 if (tport->tp_write_urb_in_use) { 1312 spin_unlock_irqrestore(&tport->tp_lock, flags); 1313 return; 1314 } 1315 1316 count = ti_buf_get(tport->tp_write_buf, 1317 port->write_urb->transfer_buffer, 1318 port->bulk_out_size); 1319 1320 if (count == 0) { 1321 spin_unlock_irqrestore(&tport->tp_lock, flags); 1322 return; 1323 } 1324 1325 tport->tp_write_urb_in_use = 1; 1326 1327 spin_unlock_irqrestore(&tport->tp_lock, flags); 1328 1329 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer); 1330 1331 usb_fill_bulk_urb(port->write_urb, port->serial->dev, 1332 usb_sndbulkpipe(port->serial->dev, 1333 port->bulk_out_endpointAddress), 1334 port->write_urb->transfer_buffer, count, 1335 ti_bulk_out_callback, tport); 1336 1337 result = usb_submit_urb(port->write_urb, GFP_ATOMIC); 1338 if (result) { 1339 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result); 1340 tport->tp_write_urb_in_use = 0; 1341 /* TODO: reschedule ti_send */ 1342 } else { 1343 spin_lock_irqsave(&tport->tp_lock, flags); 1344 tport->tp_icount.tx += count; 1345 spin_unlock_irqrestore(&tport->tp_lock, flags); 1346 } 1347 1348 /* more room in the buffer for new writes, wakeup */ 1349 if (tty) 1350 tty_wakeup(tty); 1351 wake_up_interruptible(&tport->tp_write_wait); 1352 } 1353 1354 1355 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr) 1356 { 1357 int status; 1358 1359 status = ti_write_byte(tport->tp_tdev, 1360 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR, 1361 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr); 1362 1363 if (!status) 1364 tport->tp_shadow_mcr = mcr; 1365 1366 return status; 1367 } 1368 1369 1370 static int ti_get_lsr(struct ti_port *tport) 1371 { 1372 int size,status; 1373 struct ti_device *tdev = tport->tp_tdev; 1374 struct usb_serial_port *port = tport->tp_port; 1375 int port_number = port->number - port->serial->minor; 1376 struct ti_port_status *data; 1377 1378 dbg("%s - port %d", __FUNCTION__, port->number); 1379 1380 size = sizeof(struct ti_port_status); 1381 data = kmalloc(size, GFP_KERNEL); 1382 if (!data) { 1383 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__); 1384 return -ENOMEM; 1385 } 1386 1387 status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS, 1388 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size); 1389 if (status) { 1390 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status); 1391 goto free_data; 1392 } 1393 1394 dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR); 1395 1396 tport->tp_lsr = data->bLSR; 1397 1398 free_data: 1399 kfree(data); 1400 return status; 1401 } 1402 1403 1404 static int ti_get_serial_info(struct ti_port *tport, 1405 struct serial_struct __user *ret_arg) 1406 { 1407 struct usb_serial_port *port = tport->tp_port; 1408 struct serial_struct ret_serial; 1409 1410 if (!ret_arg) 1411 return -EFAULT; 1412 1413 memset(&ret_serial, 0, sizeof(ret_serial)); 1414 1415 ret_serial.type = PORT_16550A; 1416 ret_serial.line = port->serial->minor; 1417 ret_serial.port = port->number - port->serial->minor; 1418 ret_serial.flags = tport->tp_flags; 1419 ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE; 1420 ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800; 1421 ret_serial.closing_wait = tport->tp_closing_wait; 1422 1423 if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg))) 1424 return -EFAULT; 1425 1426 return 0; 1427 } 1428 1429 1430 static int ti_set_serial_info(struct ti_port *tport, 1431 struct serial_struct __user *new_arg) 1432 { 1433 struct usb_serial_port *port = tport->tp_port; 1434 struct serial_struct new_serial; 1435 1436 if (copy_from_user(&new_serial, new_arg, sizeof(new_serial))) 1437 return -EFAULT; 1438 1439 tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS; 1440 if (port->tty) 1441 port->tty->low_latency = 1442 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0; 1443 tport->tp_closing_wait = new_serial.closing_wait; 1444 1445 return 0; 1446 } 1447 1448 1449 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr) 1450 { 1451 struct async_icount *icount; 1452 struct tty_struct *tty; 1453 unsigned long flags; 1454 1455 dbg("%s - msr 0x%02X", __FUNCTION__, msr); 1456 1457 if (msr & TI_MSR_DELTA_MASK) { 1458 spin_lock_irqsave(&tport->tp_lock, flags); 1459 icount = &tport->tp_icount; 1460 if (msr & TI_MSR_DELTA_CTS) 1461 icount->cts++; 1462 if (msr & TI_MSR_DELTA_DSR) 1463 icount->dsr++; 1464 if (msr & TI_MSR_DELTA_CD) 1465 icount->dcd++; 1466 if (msr & TI_MSR_DELTA_RI) 1467 icount->rng++; 1468 wake_up_interruptible(&tport->tp_msr_wait); 1469 spin_unlock_irqrestore(&tport->tp_lock, flags); 1470 } 1471 1472 tport->tp_msr = msr & TI_MSR_MASK; 1473 1474 /* handle CTS flow control */ 1475 tty = tport->tp_port->tty; 1476 if (tty && C_CRTSCTS(tty)) { 1477 if (msr & TI_MSR_CTS) { 1478 tty->hw_stopped = 0; 1479 tty_wakeup(tty); 1480 } else { 1481 tty->hw_stopped = 1; 1482 } 1483 } 1484 } 1485 1486 1487 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush) 1488 { 1489 struct ti_device *tdev = tport->tp_tdev; 1490 struct usb_serial_port *port = tport->tp_port; 1491 wait_queue_t wait; 1492 unsigned long flags; 1493 1494 dbg("%s - port %d", __FUNCTION__, port->number); 1495 1496 spin_lock_irqsave(&tport->tp_lock, flags); 1497 1498 /* wait for data to drain from the buffer */ 1499 tdev->td_urb_error = 0; 1500 init_waitqueue_entry(&wait, current); 1501 add_wait_queue(&tport->tp_write_wait, &wait); 1502 for (;;) { 1503 set_current_state(TASK_INTERRUPTIBLE); 1504 if (ti_buf_data_avail(tport->tp_write_buf) == 0 1505 || timeout == 0 || signal_pending(current) 1506 || tdev->td_urb_error 1507 || !usb_get_intfdata(port->serial->interface)) /* disconnect */ 1508 break; 1509 spin_unlock_irqrestore(&tport->tp_lock, flags); 1510 timeout = schedule_timeout(timeout); 1511 spin_lock_irqsave(&tport->tp_lock, flags); 1512 } 1513 set_current_state(TASK_RUNNING); 1514 remove_wait_queue(&tport->tp_write_wait, &wait); 1515 1516 /* flush any remaining data in the buffer */ 1517 if (flush) 1518 ti_buf_clear(tport->tp_write_buf); 1519 1520 spin_unlock_irqrestore(&tport->tp_lock, flags); 1521 1522 /* wait for data to drain from the device */ 1523 /* wait for empty tx register, plus 20 ms */ 1524 timeout += jiffies; 1525 tport->tp_lsr &= ~TI_LSR_TX_EMPTY; 1526 while ((long)(jiffies - timeout) < 0 && !signal_pending(current) 1527 && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error 1528 && usb_get_intfdata(port->serial->interface)) { /* not disconnected */ 1529 if (ti_get_lsr(tport)) 1530 break; 1531 msleep_interruptible(20); 1532 } 1533 } 1534 1535 1536 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty) 1537 { 1538 unsigned long flags; 1539 1540 spin_lock_irqsave(&tport->tp_lock, flags); 1541 1542 if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) 1543 tport->tp_read_urb_state = TI_READ_URB_STOPPING; 1544 1545 spin_unlock_irqrestore(&tport->tp_lock, flags); 1546 } 1547 1548 1549 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty) 1550 { 1551 struct urb *urb; 1552 int status = 0; 1553 unsigned long flags; 1554 1555 spin_lock_irqsave(&tport->tp_lock, flags); 1556 1557 if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) { 1558 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1559 urb = tport->tp_port->read_urb; 1560 spin_unlock_irqrestore(&tport->tp_lock, flags); 1561 urb->complete = ti_bulk_in_callback; 1562 urb->context = tport; 1563 urb->dev = tport->tp_port->serial->dev; 1564 status = usb_submit_urb(urb, GFP_KERNEL); 1565 } else { 1566 tport->tp_read_urb_state = TI_READ_URB_RUNNING; 1567 spin_unlock_irqrestore(&tport->tp_lock, flags); 1568 } 1569 1570 return status; 1571 } 1572 1573 1574 static int ti_command_out_sync(struct ti_device *tdev, __u8 command, 1575 __u16 moduleid, __u16 value, __u8 *data, int size) 1576 { 1577 int status; 1578 1579 status = usb_control_msg(tdev->td_serial->dev, 1580 usb_sndctrlpipe(tdev->td_serial->dev, 0), command, 1581 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT), 1582 value, moduleid, data, size, 1000); 1583 1584 if (status == size) 1585 status = 0; 1586 1587 if (status > 0) 1588 status = -ECOMM; 1589 1590 return status; 1591 } 1592 1593 1594 static int ti_command_in_sync(struct ti_device *tdev, __u8 command, 1595 __u16 moduleid, __u16 value, __u8 *data, int size) 1596 { 1597 int status; 1598 1599 status = usb_control_msg(tdev->td_serial->dev, 1600 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command, 1601 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN), 1602 value, moduleid, data, size, 1000); 1603 1604 if (status == size) 1605 status = 0; 1606 1607 if (status > 0) 1608 status = -ECOMM; 1609 1610 return status; 1611 } 1612 1613 1614 static int ti_write_byte(struct ti_device *tdev, unsigned long addr, 1615 __u8 mask, __u8 byte) 1616 { 1617 int status; 1618 unsigned int size; 1619 struct ti_write_data_bytes *data; 1620 struct device *dev = &tdev->td_serial->dev->dev; 1621 1622 dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte); 1623 1624 size = sizeof(struct ti_write_data_bytes) + 2; 1625 data = kmalloc(size, GFP_KERNEL); 1626 if (!data) { 1627 dev_err(dev, "%s - out of memory\n", __FUNCTION__); 1628 return -ENOMEM; 1629 } 1630 1631 data->bAddrType = TI_RW_DATA_ADDR_XDATA; 1632 data->bDataType = TI_RW_DATA_BYTE; 1633 data->bDataCounter = 1; 1634 data->wBaseAddrHi = cpu_to_be16(addr>>16); 1635 data->wBaseAddrLo = cpu_to_be16(addr); 1636 data->bData[0] = mask; 1637 data->bData[1] = byte; 1638 1639 status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0, 1640 (__u8 *)data, size); 1641 1642 if (status < 0) 1643 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status); 1644 1645 kfree(data); 1646 1647 return status; 1648 } 1649 1650 1651 static int ti_download_firmware(struct ti_device *tdev, 1652 unsigned char *firmware, unsigned int firmware_size) 1653 { 1654 int status = 0; 1655 int buffer_size; 1656 int pos; 1657 int len; 1658 int done; 1659 __u8 cs = 0; 1660 __u8 *buffer; 1661 struct usb_device *dev = tdev->td_serial->dev; 1662 struct ti_firmware_header *header; 1663 unsigned int pipe = usb_sndbulkpipe(dev, 1664 tdev->td_serial->port[0]->bulk_out_endpointAddress); 1665 1666 1667 buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header); 1668 buffer = kmalloc(buffer_size, GFP_KERNEL); 1669 if (!buffer) { 1670 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__); 1671 return -ENOMEM; 1672 } 1673 1674 memcpy(buffer, firmware, firmware_size); 1675 memset(buffer+firmware_size, 0xff, buffer_size-firmware_size); 1676 1677 for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++) 1678 cs = (__u8)(cs + buffer[pos]); 1679 1680 header = (struct ti_firmware_header *)buffer; 1681 header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header))); 1682 header->bCheckSum = cs; 1683 1684 dbg("%s - downloading firmware", __FUNCTION__); 1685 for (pos = 0; pos < buffer_size; pos += done) { 1686 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE); 1687 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000); 1688 if (status) 1689 break; 1690 } 1691 1692 kfree(buffer); 1693 1694 if (status) { 1695 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status); 1696 return status; 1697 } 1698 1699 dbg("%s - download successful", __FUNCTION__); 1700 1701 return 0; 1702 } 1703 1704 1705 /* Circular Buffer Functions */ 1706 1707 /* 1708 * ti_buf_alloc 1709 * 1710 * Allocate a circular buffer and all associated memory. 1711 */ 1712 1713 static struct circ_buf *ti_buf_alloc(void) 1714 { 1715 struct circ_buf *cb; 1716 1717 cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL); 1718 if (cb == NULL) 1719 return NULL; 1720 1721 cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL); 1722 if (cb->buf == NULL) { 1723 kfree(cb); 1724 return NULL; 1725 } 1726 1727 ti_buf_clear(cb); 1728 1729 return cb; 1730 } 1731 1732 1733 /* 1734 * ti_buf_free 1735 * 1736 * Free the buffer and all associated memory. 1737 */ 1738 1739 static void ti_buf_free(struct circ_buf *cb) 1740 { 1741 kfree(cb->buf); 1742 kfree(cb); 1743 } 1744 1745 1746 /* 1747 * ti_buf_clear 1748 * 1749 * Clear out all data in the circular buffer. 1750 */ 1751 1752 static void ti_buf_clear(struct circ_buf *cb) 1753 { 1754 cb->head = cb->tail = 0; 1755 } 1756 1757 1758 /* 1759 * ti_buf_data_avail 1760 * 1761 * Return the number of bytes of data available in the circular 1762 * buffer. 1763 */ 1764 1765 static int ti_buf_data_avail(struct circ_buf *cb) 1766 { 1767 return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE); 1768 } 1769 1770 1771 /* 1772 * ti_buf_space_avail 1773 * 1774 * Return the number of bytes of space available in the circular 1775 * buffer. 1776 */ 1777 1778 static int ti_buf_space_avail(struct circ_buf *cb) 1779 { 1780 return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE); 1781 } 1782 1783 1784 /* 1785 * ti_buf_put 1786 * 1787 * Copy data data from a user buffer and put it into the circular buffer. 1788 * Restrict to the amount of space available. 1789 * 1790 * Return the number of bytes copied. 1791 */ 1792 1793 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count) 1794 { 1795 int c, ret = 0; 1796 1797 while (1) { 1798 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1799 if (count < c) 1800 c = count; 1801 if (c <= 0) 1802 break; 1803 memcpy(cb->buf + cb->head, buf, c); 1804 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1); 1805 buf += c; 1806 count -= c; 1807 ret += c; 1808 } 1809 1810 return ret; 1811 } 1812 1813 1814 /* 1815 * ti_buf_get 1816 * 1817 * Get data from the circular buffer and copy to the given buffer. 1818 * Restrict to the amount of data available. 1819 * 1820 * Return the number of bytes copied. 1821 */ 1822 1823 static int ti_buf_get(struct circ_buf *cb, char *buf, int count) 1824 { 1825 int c, ret = 0; 1826 1827 while (1) { 1828 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE); 1829 if (count < c) 1830 c = count; 1831 if (c <= 0) 1832 break; 1833 memcpy(buf, cb->buf + cb->tail, c); 1834 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1); 1835 buf += c; 1836 count -= c; 1837 ret += c; 1838 } 1839 1840 return ret; 1841 } 1842